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The project aims were to extend the scope of near liquidus casting work from single strand experiments to a more production-oriented system for use on more than one strand, involving trials at British Steel's Scunthorpe Works for large blooms (355 mm x 750 mm) with casting rates around 850 - 1100 kg/min per strand.

Following equipment design and pilot plant commissioning casts, a programme of single and twin strand casting trials with product evaluation began during 1997. Fifteen production casting trials (45 ladles) were carried out for a range of high-carbon steels under conditions including faster casting soft reduction. The ability to cast up to seven 300 t ladles and to link casts to preceding and following sequences was shown. Upper and lower operational limits of the equipment have been identified.

Heat extraction under stable operating conditions has typically been equivalent to around 40-60% superheat removal for the casting conditions used. Assessments carried out on the rolled product suggested an improvement in central segregations whilst process and product quality variability appear to have been reduced. No significant difference in levels of steel cleanliness was noted.

Trial data and equipment performance have also been assessed from an operational view with regard to practicality for standard production use and potential applicability to other section sizes.

Additional information

Authors: SCHOLES A, Corus UK Ltd, Middlesborough (GB)
Bibliographic Reference: EUR 20300 EN (2002), pp.84. Euro: 13.00
Availability: EUR-OP reference: KI-NA-20300-EN-S Available from EUR-OP sales agents. URL:
ISBN: ISBN: 92-894-3438-4
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